# linux.mk
#
# Goals:
#   Configure an environment that will allow Taulabs GCS and firmware to be built
#   on a Linux system. The environment will support the current versions of Qt SDK
#   and the ARM toolchain installed to either the Taulabs/tools directory, their
#   respective default installation locations, or made available on the system path.

# Check for and find Python 2

# Get Python version, separate major/minor/patch, then put into wordlist
PYTHON_VERSION_=$(wordlist 2,4,$(subst ., ,$(shell python -V 2>&1)))
# Get major version from aforementioned list
PYTHON_MAJOR_VERSION_=$(word 1,$(PYTHON_VERSION_))
# Just in case Make has some weird scope stuff
PYTHON=0
# If the major Python version is the one we want..
ifeq ($(PYTHON_MAJOR_VERSION_),2)
	# Then we can just use the normal Python executable
	PYTHON:=python
else
	# However, this isn't always the case..
	# Let's look for `python2`. If `which` doesn't return a null value, then
	#  it exists!
	ifneq ($(shell which python2), "")
		PYTHON:=python2
	else
		# And if it doesn't exist, let's use the default Python, and warn the user.
		# PYTHON NOT FOUND.
		PYTHON:=python
		echo "Python not found."
	endif
endif

export PYTHON
